Heraclitus of Ephesus
1918 · Good
€20
Silvanus Phillips Thompson
1935 · Very good
€35
Percival Lowell, Pforzheimer Bruce Rogers Collection (Library of Congress)
1904 · Very good
€45
R. G. Collingwood
1929 · Good
€35
Ferdinand Wolff
1859 · Good · NL
€40
Alfred North Whitehead, Bertrand Russell
1911 · Very good
€25
Anselm of Canterbury, Anselm
1928 · Fair
€35
William Anthony Granville
1905 · Very good
€50
R. Fletcher
1922 · Good
€20
Henry B. Maglathlin
1869 · Very good
€50
Cassius Jackson Keyser
1935 · Good
€50
George Percival Mills
1935 · Very good
€25
Epictetus
1920 · Good
€20
Marcellus Emants
1900 · Very good · NL
€25
Marcellus Emants
1904 · Good · NL
€20
Elbert Hubbard
1915 · Good
€25
Benedictus de Spinoza, Wolfgang Bartuschat
1896 · Good
€40
Sextus Empiricus.
1887 · Good
€40
Henry Sinclair Hall, Samuel R. Knight
1904 · Fine
€30
Karl Pearson
1934 · Fine
€30
Werner Spalteholz
1906 · Good
€25
John Cowper Powys
1933 · Very good
€50
Percival Lowell
1907 · Very good
€25
Søren Kierkegaard
1884 · Good
€50
Frederick Charles Copleston
1910 · Very good
€40
Florian Cajori
1907 · Very good
€45
Eugen Horn
1900 · Good · NL
€50
Erwin Madelung
1935 · Fine
€40
John Ruskin
1900 · Very good
€25
William Hogarth
1918 · Fair
€40
Mary Whiton Calkins
1910 · Very good
€35
George Frederick Kunz
1935 · Very good
€40
Thomas Henry Huxley
1889 · Fair
€30
Tobias Ballot Muller
1916 · Fair · NL
€25
Marcellus Emants
1889 · Fair · NL
€40
H. A. J. van Swaay
1919 · Good · NL
€35
F. Matthias Alexander
1935 · Fine
€35
Arthur Schopenhauer
1868 · Good
€40
Morris Raphael Cohen
1935 · Fine
€35
Ron Larson
1906 · Good
€45
John Burroughs
1887 · Very good
€50
William James
1935 · Fair
€15
Frederik August Stoett
1908 · Very good · NL
€30
Edouard Goursat
1933 · Very good
€30
Vreeswijk, Johannes Adrianus, jr.
1909 · Good · NL
€25
Elizabeth Prentiss
1871 · Good
€35
Henry Ernest Dudeney
1935 · Fair
€25
Charles Fletcher Lummis
1902 · Very good
€25
Ron Larson
1931 · Fair
€20
Robert Hooke
1896 · Fair
€35
Ernst Christian Achelis
1902 · Good · NL
€20
Three Initiates
1928 · Good
€20
Samuel Colman, Samuel Colman
1935 · Good
€30
Richard A. Proctor
1918 · Good
€50
Eduard Strasburger
1924 · Fine
€40
Joseph William Richards
1907 · Fair
€45
Carl David Tolmé Runge
1916 · Fine
€50
Claude Irwin Palmer
1912 · Good
€20
Carl Gustav Jung
1915 · Very good
€25
Eduard Strasburger
1935 · Fine
€45